pytorch

f12896b4 - [functorch] Add `has_aux=False` to vjp, jacrev (pytorch/functorch#335)

[functorch] Add `has_aux=False` to vjp, jacrev (pytorch/functorch#335) Mitigates https://github.com/pytorch/functorch/issues/333 but we should still consider whether or not we want a jacrev_and_value API. Test Plan: - New tests